base: Erase unused FOR_EACH_OBSERVER macro.

base/android/java/src/org/chromium/base/ObserverList.java

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.base;
 
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
 import java.util.NoSuchElementException;
 
 import javax.annotation.concurrent.NotThreadSafe;
 
 /**
  * A container for a list of observers.
  * <p/>
  * This container can be modified during iteration without invalidating the iterator.
  * So, it safely handles the case of an observer removing itself or other observers from the list
  * while observers are being notified.
  * <p/>
  * The implementation (and the interface) is heavily influenced by the C++ ObserverList.
  * Notable differences:
  *   - The iterator implements NOTIFY_EXISTING_ONLY.
- *   - The FOR_EACH_OBSERVER closure is left to the clients to implement in terms of iterator().
+ *   - The range-based for loop is left to the clients to implement in terms of iterator().
  * <p/>
  * This class is not threadsafe. Observers MUST be added, removed and will be notified on the same
  * thread this is created.
  *
  * @param <E> The type of observers that this list should hold.
  */
 @NotThreadSafe
 public class ObserverList<E> implements Iterable<E> {
     /**
      * Extended iterator interface that provides rewind functionality.
@@ skipping 205 matching lines @@
         }
 
         private void compactListIfNeeded() {
             if (!mIsExhausted) {
                 mIsExhausted = true;
                 ObserverList.this.decrementIterationDepthAndCompactIfNeeded();
             }
         }
     }
 }